<template>
    <div class="upload-box">
        <el-upload :id="uuid" action="#" :class="['upload', imageDisabled ? 'disabled' : '', drag ? 'no-border' : '']"
            :multiple="false" :disabled="imageDisabled" :show-file-list="false" :http-request="handleHttpUpload"
            :before-upload="beforeUpload" :on-success="uploadSuccess" :on-error="uploadError" :drag="drag"
            :accept="fileType.join(',')" :folderName="folderName" :fileParam="fileParam">
            <template v-if="imageUrl">
                <img :src="imageUrl" class="upload-image" />
                <div class="upload-operate" @click.stop>
                    <div v-if="!imageDisabled" class="upload-icon" @click="handleEditImage">
                        <el-icon>
                            <Edit />
                        </el-icon>
                        <span>编辑</span>
                    </div>
                    <div class="upload-icon" @click="imageViewShow = true">
                        <el-icon>
                            <ZoomIn />
                        </el-icon>
                        <span>查看</span>
                    </div>
                    <div v-if="!imageDisabled" class="upload-icon" @click="handleDeleteImage">
                        <el-icon>
                            <Delete />
                        </el-icon>
                        <span>删除</span>
                    </div>
                </div>
            </template>
            <template v-else>
                <div class="upload-content">
                    <slot name="content">
                        <el-icon>
                            <Plus />
                        </el-icon>
                        <!-- <span>请上传图片</span> -->
                    </slot>
                </div>
            </template>
        </el-upload>
        <div class="upload-tip">
            <slot name="tip"></slot>
        </div>
        <el-image-viewer v-if="imageViewShow" :url-list="[imageUrl]" @close="imageViewShow = false" />
    </div>
</template>

<script setup lang="ts" name="KoiUploadImage">
import { ref, computed, inject } from "vue";
import { ElLoading } from "element-plus";
import { generateUUID } from "@/utils";
import axios from "axios";
import { ElNotification, formContextKey, formItemContextKey } from "element-plus";
import type { UploadProps, UploadRequestOptions } from "element-plus";

interface IUploadImageProps {
    imageUrl: string; // 图片地址 ==> 必传
    action?: string; // 上传图片的 api 方法，一般项目上传都是同一个 api 方法，在组件里直接引入即可 ==> 非必传
    drag?: boolean; // 是否支持拖拽上传 ==> 非必传[默认为 true]
    disabled?: boolean; // 是否禁用上传组件 ==> 非必传[默认为 false]
    fileSize?: number; // 图片大小限制 ==> 非必传[默认为 3M]
    fileType?: any; // 图片类型限制 ==> 非必传[默认为 ["image/webp","image/jpg", "image/jpeg", "image/png", "image/gif"]]
    height?: string; // 组件高度 ==> 非必传[默认为 120px]
    width?: string; // 组件宽度 ==> 非必传[默认为 120px]
    borderRadius?: string; // 组件边框圆角 ==> 非必传[默认为 6px]
    folderName?: string; // 后端文件夹名称
    fileParam?: string; // 文件类型[可向后端传递参数]
}

// 接收父组件参数
const props = withDefaults(defineProps<IUploadImageProps>(), {
    imageUrl: "",
    action: "https://api.xinyew.cn/api/yanxuantc",
    drag: true,
    disabled: false,
    fileSize: 3,
    fileType: () => ["image/webp", "image/jpg", "image/jpeg", "image/png", "image/gif"],
    height: "120px",
    width: "120px",
    borderRadius: "6px",
    folderName: "files",
    fileParam: "-1"
});

// 生成组件唯一id
const uuid = ref("id-" + generateUUID());

// 查看图片
const imageViewShow = ref(false);
// 获取 el-form 组件上下文
const formContext = inject(formContextKey, void 0);
// 获取 el-form-item 组件上下文
const formItemContext = inject(formItemContextKey, void 0);

/** 判断是否禁用上传和删除 */
const imageDisabled = computed(() => {
    return props.disabled || formContext?.disabled;
});

/**
 * @description 图片上传
 * @param options upload 所有配置项
 * */
const emit = defineEmits<{
    "update:imageUrl": [value: string];
}>();
const handleHttpUpload = async (options: UploadRequestOptions) => {
    let formData = new FormData();
    formData.append("file", options.file);
    const loadingInstance = ElLoading.service({
        text: "正在上传",
        background: "rgba(0,0,0,.2)"
    });
    try {
        if (props.fileParam == "-1" || props.fileParam == "") {
            props.fileParam === "-1";
        }
        // const res: any = await axios.post(props.action + "/" + props.fileSize + "/" + props.folderName + "/" + props.fileParam, formData);
        const res: any = await axios.post(props.action, formData, {
            headers: {
                'Content-Type': 'multipart/form-data'
            }
        });
        emit("update:imageUrl", res.data.data.url);
        loadingInstance.close();
        // 调用 el-form 内部的校验方法[可自动校验]
        formItemContext?.prop && formContext?.validateField([formItemContext.prop as string]);
    } catch (error) {
        loadingInstance.close();
        options.onError(error as any);
    }
};

/** 删除图片 */
const handleDeleteImage = () => {
    emit("update:imageUrl", "");
};

/** 编辑图片 */
const handleEditImage = () => {
    const dom = document.querySelector(`#${uuid.value} .el-upload__input`);
    dom && dom.dispatchEvent(new MouseEvent("click"));
};

/**
 * @description 文件上传之前判断
 * @param rawFile 选择的文件
 * */
const beforeUpload: UploadProps["beforeUpload"] = rawFile => {
    const imgSize = rawFile.size / 1024 / 1024 < props.fileSize;
    const imgType = props.fileType.includes(rawFile.type);
    if (!imgType)
        ElNotification({
            title: "温馨提示",
            message: "上传图片不符合所需的格式！",
            type: "warning"
        });
    if (!imgSize)
        setTimeout(() => {
            ElNotification({
                title: "温馨提示",
                message: `上传图片大小不能超过 ${props.fileSize}M！`,
                type: "warning"
            });
        }, 0);
    return imgType && imgSize;
};

/** 图片上传成功 */
const uploadSuccess = () => {
    ElNotification({
        title: "温馨提示",
        message: "图片上传成功！",
        type: "success"
    });
};

/** 图片上传错误 */
const uploadError = () => {
    ElNotification({
        title: "温馨提示",
        message: "图片上传失败，请您重新上传！",
        type: "error"
    });
};
</script>

<style scoped lang="scss">
.is-error {
    .upload {

        :deep(.el-upload),
        :deep(.el-upload-dragger) {
            border: 2px dashed var(--el-color-danger) !important;

            &:hover {
                border-color: var(--el-color-primary) !important;
            }
        }
    }
}

:deep(.disabled) {

    .el-upload,
    .el-upload-dragger {
        cursor: not-allowed !important;
        background: var(--el-color-primary-light-9);
        border: 2px dashed var(--el-color-primary) !important;

        &:hover {
            border: 2px dashed var(--el-color-primary) !important;
        }
    }
}

.upload-box {
    .no-border {
        :deep(.el-upload) {
            border: none !important;
        }
    }

    :deep(.upload) {
        .el-upload {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            width: v-bind(width);
            height: v-bind(height);
            overflow: hidden;
            border: 2px dashed var(--el-color-primary);
            border-radius: v-bind(borderRadius);
            transition: var(--el-transition-duration-fast);

            &:hover {
                background: var(--el-color-primary-light-9);

                .upload-operate {
                    opacity: 1;
                }
            }

            .el-upload-dragger {
                display: flex;
                align-items: center;
                justify-content: center;
                width: 100%;
                height: 100%;
                padding: 0;
                overflow: hidden;
                background-color: transparent;
                border: 2px dashed var(--el-color-primary);
                border-radius: v-bind(borderRadius);

                &:hover {
                    border: 2px dashed var(--el-color-primary);
                }
            }

            .el-upload-dragger.is-dragover {
                background-color: var(--el-color-primary-light-9);
                border: 2px dashed var(--el-color-primary) !important;
            }

            .upload-image {
                width: 100%;
                height: 100%;
                object-fit: contain;
            }

            .upload-content {
                position: relative;
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                font-size: 12px;
                line-height: 30px;
                color: var(--el-color-primary);

                .el-icon {
                    font-size: 28px;
                    color: var(--el-color-primary);
                }
            }

            .upload-operate {
                position: absolute;
                top: 0;
                right: 0;
                box-sizing: border-box;
                display: flex;
                align-items: center;
                justify-content: center;
                width: 100%;
                height: 100%;
                cursor: pointer;
                background: rgb(0 0 0 / 50%);
                opacity: 0;
                transition: var(--el-transition-duration-fast);

                .upload-icon {
                    display: flex;
                    flex-direction: column;
                    align-items: center;
                    justify-content: center;
                    padding: 0 6%;
                    color: var(--el-color-primary-light-2);

                    .el-icon {
                        margin-bottom: 40%;
                        font-size: 130%;
                        line-height: 130%;
                    }

                    span {
                        font-size: 85%;
                        line-height: 85%;
                    }
                }
            }
        }
    }

    .upload-tip {
        font-size: 12px;
        line-height: 26px;
        color: var(--el-color-primary);
        text-align: left;
    }
}
</style>
